Revolving door



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UNITED STATES LSMJW PATENT OFFICE-ii CECIL ALEXANDER ELLIOTT, 0F READING, ENGLAND, ASSIGNOR. OF ONE-HALF TO SAMUEL ELLIOTT AND SONS (READING), LIMITED, 013 READING, BERKS, ENGLAND..

REVOLVING DOOR.

Application filed January 5, 1921. Serial No. 435,224.

To all whom it may concem:

Be it known that I, CECIL ALEXANDER ELLIOTT, a subject of the King of Great Britain, residing at Gosbrook Road, Caversham, Reading, in the county of Berks, England, have invented certain new and useful Improvements in or Relating to Revolving Doors, of which the following is a specification.

This invention relates stile doors.

The object of the invention is by the adoption of spring hinges of a suitable pattern as the hinges or pivots of the leaves of'the central revolving body, where such leaves are made movable, to render the latter sothat after they are turned from their normal position to open the doorway they may be automatically returned to close the doorway. a

It applies to the kind of door, the revolving portion of which is composed of a central screen axially arranged through the centre of the. outer casing of the enclosin framework, which screen has wings projectto revolvingv turning from the ends, which together with the screen approximately form the letter H in plan, and are known as two-compartment revolving turnstiledoors; and further to where it is desirable that thecentral screen body shall contain a door or doors which" open both ways on hinges or pivots.

According to my invention, I arrange the central screen doors, so that they are adapted to close automatically by. the application of suitable springs or other resilient means to the hinges or pivots on which the central door screen is carried.

This automatic construction may also be applied to revolving turnstile doors having radial leaves revolving about a central axis, and where it is desirable that the leaves shall close self-actingly.

Also I may provide, when necessary, means in connection withthe spring controlled pivots to prevent the-leaves closing violently, and the said means may be in the form of air or oil checks or other suitable device.

By means of my invention I obtain a combination of a revolving door and spring swung doors, the latter of which are selfclosing.

The accompanying drawings illustrate structures in accordance with the vention.

In the drawings Figure 1 is a front elevation of a revolving door.

Figure 2 is a sectional plan through the present in line AB of Figure 1, showing curved wings.

Figure 3 is a sectional plan similar to Figure 2, but having flat wings with extensions instead of. curved wings as in Fig. 2, Fig. 3 also showing said extensions movably connected as by a hinge, but said extensions may be rigidly connected, as by integral formation with the wing; and either type can be'used at one or both sides of the structure.

Figures 4 and l are fragmentary views partially in section of spring bolt and spring catch devices.

Figure 5 is a sectional plan of Figure 4.

Figure 5 is a sectional plan of Figure 4.

Figure 6 is a sectional detail showing the elastic cushioning device provided in the stationary framework to make contact with the edge of the revolving wings.

Figure 7 isa sectional plan showing the wings folded back on the screen and forming a gangway at both sides, the screen be ingcentrally positioned.

Figure 8 is a sectional plan showing the wings folded back on the door or screen and forming a central gangway, the door or screen with folded wings thereon bein movable on a stationary guide-way to one side of the door framework.

Figure 9 is a rear elevation of the door showing stop brackets and means for. auto- -matic release of the wings.

Figure. 10 is-a sectional plan showing a modified arrangement of the door or screen and foldable wings.

Figure ll isan elevation of a key device for operating the cable to effect the automatic. release of the wings.

Figure. 12 is a further elevation of said key device showing the angular position the key takes up when exerting a pull action upon the cable. v

Fi re 13 is a sectional plan showing said key in position upon the door or screen structure.

Figure 14 is a vertical section of the top of the revolving door casing showing the mode of door suspension and elastic means for the automatic turning and control of the revolving screens,

Figure 1s a plan thereof, Fig. 16 is a sectional view showing door frame of two compartment door and wings with adjacent parts partially in section and bracket with catch device in position upon pivots 0.

I bers the springs of the hinges b are com-i pressed by the slidable bolts which are opwing attached to central screen frame and showmg control cables passing from catch device to opening or hole in central screen frame down which they pass and are op- .erated in the herein described manner; In carrying the invention mto effect the central leaves a thereof, see Figure 1, are provided with spring hinges b and have These spring hinges and pivots are shown in enlarged detail in Figures 4 and 4 and 5 and 5 of. the drawings, in which I) is the spring hingedeviceand c is apiv'ot.

The spring hinges comprise a casement I b attached to the door, within the casement is a central pivotb positively fixed at its lower end 6 in a ball bearing device 6 upon the inember b. At each side of the central pivot b is a roller 1), carried by a stud b", and adapted, when the door is turned to i press against a slidable block b and so tension a spring I) attached to the block b at one end and supported by bearers b in which it is free to slide at both ends.

On turning'the central door screen memerated through the hinge pin by-the movement of the door members to compress the springs, which when the door members are released react toreturnthe said members.

The central leaves a of the door are held in closed position by spring catches or bolts d, see Figure 1, and it is necessary to withh in order to adjust them in their relation to the outer circular screen 7' or to allow of their being folded inwards upon the central door body g, see Figures 2, 3, 7, 8 and 10, such hinges or pivots, or the movements thereof, being controlled by springs k 1f desirable, or other resilient means, see Figure 10.

In order to ensure that the leaves 7'' shall be held in their roper position, brackets Z, see Figures 2, 3, 8, 9 andlO, are provided attached to the central body frame 9 with means of attachment at their ends to allow for a justments being made. These bracktion therewith.

ets Z hold the wings f at right angles to the members a'against the action of springs k and are arranged to be turned out of the way when the leaves 7 are to be folded upon the central door body 9, and when the leaves are so folded they are held securely by catch plates m.

The central body 9 with folded leaves f is turnable at right angles to its central axis or line of suspension and when secured in this position by bolts or catches it provides clear gangways n on either side, see Figure 7, and direction of arrows on either side.

In order to give as. much space as possible in these gangways, it may be desirable to make the wings f flat or with slight curvature, as it is obvious that if flat wings f are employed, these when folded will provide more gangway space. These have wide outer extensions 0 joined on at such an angle as will allow them to follow approximately the curve of the outer framing or. screen y,

or these outer extensions 0 maybe hinged to the wings f if desired.

' In the case of a two-compartment door,

which has been folded, I arrange that the whole of the revolving portions are movable to one side, after folding wings 7 upon the central 'door body 9, by means of tracks in the form of guide-ways 70 positioned in the roof and floor.

Any or all of the collapsing arrangements described-can be brought into action by the movement of one or more levers or other suitable means, mechanically or electrically operable torelease them automatically, so as lllll to facilitate the opening of the revolving door in case of panic.

In doors of the two-compartment type it is necessary in order to allow free movement of" the surfaces, that actual contact shall .not. take place between the extended wings f and the outer casing j, and in order to meet this condition I provide cushions r 7 on the outer casing 7', see Figure 6, which are adjustable as regards projection, in

order .to give the most effective results in preventing draughts.

The cushions r'may be in the form of padded strips 8 of wood or other suitable material fitted into upright grooves t'provided in the outer fixed casing 7', so that the revolving wings f touch them as they come to rest. The cushion can be adjusted by screws u operating through the strips 3 and compression springs '12 arranged in connec- To ensure that the door after use stops correctly in theposltion shown in Fi res 2, 3 and 10 it is necessaryto have amec anical check to stop the revolving motion when the revolving screens at this point and conse a carriage at movable by runners 2 on rails 2 The piston z? is. carried by a rod 2", slotted to act as a relief pressure valve, and has a runner 2 co-acting with a spring constrained lever z" pivoted at one end to a member a and at the other end the spring 2 J is attached. A further lever 2 (shown key 20 through which the cable passes. This runner 2 arrange above the member in Figure 15, but below in Figure 14) is pivoted to the meinber 2 at one end and at the other end is connected by cable or rope z to a counterpose or handle 2' on pulling of which the doors can be turned 'to a position at right angles to the normal or moved to side' of casement. The lever 2 has a cam or raised art z" co-acting with a door. is closed. and the dotted position of the lever 2 indicates the position this-lever takes up when the .pull upon the cable or rope z is exerted against the resistance of a recoil spring e the ends of which are anchored to the lever 2 and the member 2 in line with the cam a.

The automatic release of the .wings f to cause collapseof the same maybe effected through the agency of a key or handle w adapted to operate by exerting a pulling action thereon a cable a: to withdraw the bolts holding the 'wing brackets and the upper and lower door bolts or pivots simultaneously. This cable can be concealed in the door structure and is pulled taut by the is shown in Figures 9, 11, 12 and 13. For obtaining this automatic release in doors with radial wings (see also Fig. 16) the wing brackets l are hinged at one end to the central door frame 9 and are secured at theouter i end by spring bolt catches 0 attached to cables as passing over guide pulleys D and down an opening or hole E provided in the door frame 9 where they pass and are connected to the top and bottom pivots so as to withdraw the same for the purposes described. The adjustable pivoted brackets Z on release of their catches swing down on their hinges and allow the wings f to fold by the action of the springs k.

Revolving doors accordln to my invention may be made of we metal, either separately or combined, or of any suitable materials.

in. connection with a central door pivot 2 which turns; on ball bearings. At the full line position shownin Fig. 15 the. parts are at rest, as when the Having now described my invention, what I claim as new and desire tosecure. by Letters Patent is g 1. The combination with two oppositelycur ved casement walls, a framing disposed therebetween, and foldable leaves attached.

to said framing adapted to open centrally from the closed position, said framing and leaves forming a revolving central door screen, of foldable wings carried by the said framing and revolving with the said screen in an extended positional; right angles to the said screen adjustable brackets for hold ing the said wings in the extended position pivoted to the said framing at one of their ends, and releasable catches provided at the other end of the adjustable brackets, the attachment of said leaves to said framing comprising hinges provided with resilient means for returning the said leaves .to the closed position.

2. The combination of two oppositelycurved casement walls, a framing disposed therebetween, and foldable leaves carried by the said framing, adapted to open centrally said framing and leaves forming a revolving central door screen, foldable wings carried by the'said framing and revolving with the said screen, adjustable brackets for holding the said wings in extended position, a pivot to which each adjustable bracket is attached at one end, aureleasable catch pro vided at the other end of the bracket, a

spring hinge farming the attachment of each leaf to said framing. and adapted to return the leaf to its closed position and releasable spring catches or bolts for holding the leaves in their closed position.

3. The combination of two oppositelycurved casement walls, a framing disposed therebetween and capable of revolving, foldable leaves carried by said framing so as to constitute a central door screen, a pivot on which said screen revolves, foldable wings hinged to the said screen framing and revolvin holding said wings in extended position, a pivot to which each adjustable bracket is atwith the screen, adjustable brackets for tached atone end, a releasable catch provided at the other end of the bracket, a spring hinge forming the attachment of each leafto said framing and adapted to return lllti the leaf to its closed position, and springs interposed between the foldable wings, held in extended position by the adjustable brackets, and the central door screen for folding the said wings upon the central door screen when the spri catches of the adjustable brackets have een withdrawn and the said wings released for folding.

4. The combination of two opsositelycurved casement Walls, a framing isposed therebetween and foldable leaves carried by the saidframing adapted to open centrally said framing and leaves forming a cenhal m 'er end \of each bracket, a spring hinge formdoorscreen, flat foldable wings carried by the saidframing and revolving with the said screen, adjustable brackets for holding the said wings in extended position, a pivot to which each of said brackets is attached at one end, a spring controlled releasable catch carried by the other end of the bracket, anda spring hinge forming the attachment of each leaf to said framing and adapted toreturn it to its closed position.

, 5. The combination of two oppositelycurved casement walls, a framing disposed therebetween and foldable leaves carried by the said framing adapted to open centrally sa'idframing and leaves form1ng a central. door screen, flat foldable wings having canted extensions connected therewith and/can ried by and revolving with the said screen, adjustable brackets holding the said wings in extended position, a pivot to which each of said brackets is attached at one end, a spring controlled releasable catch at the other end of eachbracket and a spring hinge forming the attachment of each leafto sa1d framing and adapted to return it from open to closed position.

6. The combination of two oppositely curved casement walls, a framing disposed therebetween and foldable leaves carried by the said framing adapted to open centrally said framing and leaves forming a central door screen, foldable win hinged to said screen framing and revolving with the same, adjustable brackets holding said wings in extended position, a pivot to which each adjustable bracket is attached at one end, a releasable spring controlled catch at the othing the attachment of each leaf to sald framing and adapted to return the leaf to a closed position, and adjustable draught ex- I eluding cushions, s ring exerted, located in a groove at each si e of each casement wall and co-acting with the free edges of the extended win carried by the central door screen to c ose the air space between the casement and the said edges when the door is in its closed osition.

7. The com ination of two oppositelycurved casement walls, a framing disposed therebetween and foldable leaves carried by thejsaid framing adapted to open centrally said framing and leaves forming a central door screen, .foldable win 5 hinged to said screen framing and revolving therewith, ad-

justable bracketsholding said, wings in exrelease the spring-controlled catches and the tended position apivot to which each adadjustable brackets to allow the wings to fold inwardly on the screen, and springs each attached at one end to the screen and at the other to a wing to cause the inward folding movement.

8. The combinatlon of two oppositely-L curved casement walls, a'framing disposed therebetween and foldable leaves carried by the said framing adapted to open centrally said framing and leavesformmg a central 7 door screen foldable wings hinged to said screen framing and-revolving therewith, ad-

justablebrackets holding said wings 1n extended position, a pivot to which each adjustable bracket is attached at one end, a

releasable spring-controlled catch at the other end of each bracket, cable means operable to release the s ring-controlled catches, and the adjustable rackets, springs to cause the Evlings to fold, and means to operate the cav9. The combination of two oppositelycurved casement walls, avframing disposed therebetween and foldable leaves carried by the said framing adapted to open centrally said framing and leaves forming a central door screen, foldable wings hinged. to said framing and revolving therewith, adjustable brackets holding said wings in extended 0- sition, a pivot to which each adjusta le bracket is attached at one end, a releasable spring-controlled catch at the other end of each bracket, cable means operable to release thevspring-controlled catches and the adjustable brackets, springs to cause the- 

